$ git clone -n https://src.fedoraproject.org/rpms/perl-Exporter-Declare.git /var/lib/mock/f45-build-23356-597/root/chroot_tmpdir/scmroot/perl-Exporter-Declare
Cloning into '/var/lib/mock/f45-build-23356-597/root/chroot_tmpdir/scmroot/perl-Exporter-Declare'...
$ git fetch origin 90f630efd5679649dd2e93c42a3de01842a63141:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Exporter-Declare
 * [new ref]         90f630efd5679649dd2e93c42a3de01842a63141 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 90f630e Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild